Carbon - Different Forms NDA Questions

NDA Chemistry

Carbon - Different Forms MCQ Questions


13.
Compounds of carbon and hydrogen only are called:
A.
Alcohols
B.
Carbohydrates
C.
Carboxylic acids
D.
Hydrocarbons
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ANSWER :
D. Hydrocarbons
14.
Hydrocarbons containing only single covalent bonds between carbon atoms are called:
A.
Alkanes
B.
Alkynes
C.
Alkenes
D.
Aromatic hydrocarbons
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ANSWER :
A. Alkanes
15.
The general formula of alkenes (hydrocarbons with one carbon-carbon double bond) is:
A.
CnHn
B.
CnH2n
C.
CnH2n-2
D.
CnH2n+2
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ANSWER :
B. CnH2n
16.
What is the general formula for alkynes, which contain a carbon-carbon triple bond?
A.
CnH2n-2
B.
Cn H2n+1
C.
CnH2n+2
D.
CnH2n
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ANSWER :
A. CnH2n-2
17.
Ethyne (acetylene, C2H2) belongs to which homologous series?
A.
Alkenes
B.
Alkynes
C.
Alcohols
D.
Alkanes
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ANSWER :
B. Alkynes
18.
A series of compounds in which the same functional group substitutes for hydrogen in a carbon chain, with successive members differing by a CH2 unit, is called a/an:
A.
Isomeric series
B.
Periodic series
C.
Polymeric series
D.
Homologous series
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ANSWER :
D. Homologous series